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  • Comparisons of Javascript 'data grids'?

    - by Joe
    I've found plenty of questions between here and StackExchange of people asking for the 'best' data grid / data table, or one that has a particular feature, and plenty of lists out there (of various ages) listing the various data grid implementations ... but is anyone aware of any matrix of what features the various solutions implement? (eg, allow shift-click to select multiple; support checkboxes for selection; can update a regular table in-place; allow editing of cells; support websql or indexeddb for local caching; which browsers they support; infinite scroll; etc.) There's a generic 'javascript framework' comparison on wikipedia, which would be the sort of thing I'm looking for, but it doesn't go into detail on data grids. (which makes sense, as so many are extensions, not core features of those frameworks, and in the case of jQuery, there's lots of 'em.)

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  • Download the Visual Studio 2010 Trial Today

    Visual Studio 2010 is here! Get multiple monitor support; new support for SharePoint development, including numerous templates; enhanced multi-targeting support allowing developers to target multiple versions of the .NET Framework; and experience how Visual Studio 2010 simplifies building standards-based Web applications with improved AJAX frameworks, core IntelliSense support for JavaScript, and jQuery....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • How do I know, when my develpment skills is enough to do some "real" job?

    - by hjdm
    I am in proccess of constant learning web technologies now. I have know php, pure javascript ( I think, I can pick up jquery fast if needed ), html, css and basic crud with databases. I understand how MVC frameworks work. I have made a couple websites for friends ( one with my own engine ). Maybe it is time to try to do some interesting stuff for someone? ( say freelance or try to find some job in this industry ) Which expierence did you have, when you got your first job?

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  • Web API Presentation at DC DNUG

    - by Steve Michelotti
    This Tuesday (July 19), I’ll be presenting the ASP.NET Web API at the DC DotNet Users Group. Abstract: Modern web applications have seen an explosion in Web API creation. Twitter, Facebook, Google, Azure, you name it – it is becoming essential to provide a Web API so that consumers can build applications and mashups on top of your services. Web 2.0 has shown a trend away from SOAP towards a REST architecture style. With the new ASP.NET Web API, Microsoft is now providing first-class support for HTTP services including tools to apply the richness of a REST architectural style. This demo heavy presentation will show how the new ASP.NET Web API will enable you to build rich HTTP services in a REST architectural style while leveraging custom media types, custom HTTP handlers, jQuery and more! The presentation will also cover new features of MVC 4 including Razor enhancements, Web Optimizations, and more.

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  • Protecting the integrity of a game state while minimizing amount of data sent

    - by espais
    I'm developing a game in PHP/jQuery, and naturally have to be wary of any sort of data coming from the client. At present, I have tables of data representing the map (2D roguelike), monsters, items, and player(s). Initially, my thought was to simply package it all in a JSON object and send it every game tick, however when actually looking at the data I realized that's quite a large packet to be sending. So, my question is what is a good approach for minimizing data sent to the client? Obviously I would need to figure out some way of validating whatever it sends back. Initially we'd hoped to do some minimal verification on the client-side, but each time we thought of one thing we could do it is immediately invalidated with tools like Firebug. Kind of an open question I realize, but we want to get this right before we move on with our implementation so we don't have to shoehorn in bugfixes later on.

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  • What are the pros and cons of Coffeescript?

    - by Philip
    Of course one big pro is the amount of syntactic sugar leading to shorter code in a lot of cases. On http://jashkenas.github.com/coffee-script/ there are impressive examples. On the other hand I have doubts that these examples represent code of complex real world applications. In my code for instance I never add functions to bare objects but rather to their prototypes. Moreover the prototype feature is hidden from the user, suggesting classical OOP rather than idiomatic Javascript. The array comprehension example would look in my code probably like this: cubes = $.map(list, math.cube); // which is 8 characters less using jQuery...

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  • Good book about advanced programming techniques [closed]

    - by Luca
    I am looking to a book covering adavnced programming techniques, covering different practical scenarios and describing the different challanges with the relative solutions. As example, which are the best ways to implement a module for buying on a web application with credit card or how to manage responsivenes for the frontend of the web application itself (dealing with cache, optimeze plugins, etc). On the web there are tons of tutorials about these topics, but I am looking for a book where such cases are collected all together and treated by real professionists. If the book would provide some code samples, that would be a plus (especially if C# .NET), but I am more interested in the approach/solution rather than the code details. I could not find any of these cases in the general book about programming, therefore I hope someone might point me in the right direction. EDIT: I have 4 years experience as web developer, mainly with Microsoft (C#, ASP.NET, SQL Server) and client side technologies (jQuery, HTML/CSS).

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  • re: Production ASP.NET MVC Plug

    Just wanted to do a quick plug for my first production asp.net mvc app. It's not too complex at the moment, but its going to grow into something potentially large, so I am now working on a new version to handle multiple cities. I also wanted to get it up and running with little jquery/client side features and plug in these "nice to haves" as we progress. Let me know what you guys think! I've got a pretty solid handle on Facebook Connect, so...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Windows Phone App with 4SQ

    - by Nuttanon Pornpipak
    I'm want to create a my own Coffee shop app for semester's project. It's Windows Phone App. The App can i.e. view who is check-in here now , view menu , view photo by using 4SQ Endpoint APIs. And my problem is I don't know how to start it...which book i should read about C# and I don't know which knowledge (keyword) should i google it i.e. GET POST METHOD , JSON I ever used 4SQ Endpoint APIs once with javascript (jquery) $.ajax{(.....)} to get data from 4SQ Endpoint APIs So I googled and found JSON.NET Class but I don't know how to use it because i never programming in C# I'm just begin programming. I can programming in C only. Thank you Sorry for my bad grammar

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  • Oracle Application Express 4.2 disponible en version finale, l'outil de développement pour Oracle Database se recentre sur le mobile

    Oracle Application Express, l'outil de développement rapide d'Oracle est désormais disponible en version 4.2. Cet outil, intégré à Oracle Database sans coût supplémentaire, permet de développer des applications Web exploitant les données d'une base Oracle. Cette mise à jour est très centrée vers le mobile et apporte un certain nombre de nouveautés pour le développement d'application mobile avec APEX. Notons en particulier :Le rendu des applications qui s'adapte pour proposer une interface adaptée au terminal mobile utilisé L'utilisation de jQuery Mobile qui permet la compatibilité sur la majorité des terminaux sans modification La possibilité de créer des graphiques en HTML5 pour les terminaux ne disposant pas de Flash L'utilisation ...

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  • How to use HTTP Handler to make a client2client communication? [closed]

    - by meorfi
    I'm new to Web programming! I try to make an app (something like Client to Client communication with C# Handlers and jQuery). I.E.: When 1Client make a click on his clientSide(browser), there paints one point, and on the same time the 2Client sees what 1Client did. And, in turn, where 2Client make a click on his browser, there paints one point, and the 1Client also sees what 2Client did. I could done already the configuration of IIS, I made an simple show Hello World and it run OK. And, further, what should i done.... Can you advice me, please, with some exemples, or tutorials, how to do this job. Sorry for my questions which seems to be not studied.

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  • Falsey values vs null, undefned, or empty string

    - by user687554
    I've worked with jQuery over the years. However, recently, I've found myself getting deeper into the JavaScript language. Recently, I've heard about "truthy" and falsey values. However, I don't fully understand them. Currently, I have some code that looks like this: var fields = options.fields || ['id', 'query']; I need to identify if fields is null, undefined, or has a length of 0. I know the long way is to do: if ((fields === null) || (fields === undefined) || (fields.length === 0)) { ... } My question is, is the following the same: if (!fields) { ... } Thank you!

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  • Part-time Programming Job London

    - by Bluechip Solutions
    I am a student at Middlesex Universtity, London studying Information Technology. I really love software development and I have taught myself how to write HTML + CSS, JavaScript (I use jQuery and AngularJS) and Java (I learnt this in school). I have developed few apps (a desktop app in Java and a mobile app with AngularJS and PhoneGap) I am looking at applying for a part-time programming job to develop myself. Are there part time jobs available for someone like me and are my skill set enough to get me a job? I understand this topic may not be ideal here but this is the only place I know can provide me answers. Thank you!

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  • getting the value of a pseudo-element with protractor

    - by bodine
    I'd like to verify the text content of a pseudo-element. The promise returned from using ptor.executeScript("window.getComputedStyle(jQuery('.my-class')[0], ':after').content").then(function(data){ console.log(arguments) // {'0':null} }); I've also tried dropping that in the expectation, but I'd guess that fails for the same reason. Since the CSS Declaration for this is pointing at one of the element's attributes anyway, should I just try to read that attribute?

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  • subneting .. is 192.168.0.1/24 different than 192.168.0.1/25

    - by SM
    So i am trying to understand subnetting. I understand that you can take 192.168.0.0/24 domain and break it up in 2 subnets. 192.168.0.0/25 and 192.168.0.128/25 .. so what if i need to create 2 more subnets inside both of those above subnets. What if i need to create 2 subnets, which have 2 more subnets inside them and each of those 2 subnets have 2 hosts. As per my calculation, this would be something like. top 2 subnets: 192.168.0.0/25 and 192.168.0.128/25 subnets of 192.168.0.0/25: 192.168.0.0/26 - 192.168.0.128/26 subnets of 192.168.0.128/25: 192.168.0.128/26 - 192.168.0.192/26 hosts of 192.168.0.0/25: 192.168.0.1/25 - 192.168.0.2/25 hosts of 192.168.0.128/25: 192.168.0.129/25 - 192.168.0.130/25 hosts of 192.168.0.0/26: 192.168.0.1/26 - 192.168.0.2/26 hosts of 192.168.0.128/26: 192.168.0.129/26 - 192.168.0.130/26 hosts of 192.168.0.128/26: 192.168.0.129/26 - 192.168.0.130/26 hosts of 192.168.0.192/26: 192.168.0.193/26 - 192.168.0.194/26 The above doesnt seem right, i am moving down like a tree, however the subnet mask and IPs are being repeated, i am just add 1 to /x and making the ips from there. Can anyone please tell me if this is correct The scenario i am trying to understand is similar to this, however i just want to add hosts on each level as well. http://www.ciscotrick.com/wp-content/uploads/2008/08/the_mathematical_relationship_between_network_block_sizes.jpg

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  • jqGrid trigger "Loading..." overlay

    - by gurun8
    Does anyone know how to trigger the stock jqGrid "Loading..." overlay that gets displayed when the grid is loading? I know that I can use a jquery plugin without much effort but I'd like to be able to keep the look-n-feel of my application consistent with that of what is already used in jqGrid. The closes thing I've found is this: http://stackoverflow.com/questions/2614643/jqgrid-display-default-loading-message-when-updating-a-table-on-custom-update n8

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  • Requires valid signature error, facebook api

    - by soField
    i'am using this example http://github.com/facebook/connect-js/blob/master/examples/jquery/login.html works fine , but when i change query part to read my statuses i am getting exception Requires valid signature for instance this query select message from status where uid=myuid

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  • Large Object Heap Fragmentation

    - by Paul Ruane
    The C#/.NET application I am working on is suffering from a slow memory leak. I have used CDB with SOS to try to determine what is happening but the data does not seem to make any sense so I was hoping one of you may have experienced this before. The application is running on the 64 bit framework. It is continuously calculating and serialising data to a remote host and is hitting the Large Object Heap (LOH) a fair bit. However, most of the LOH objects I expect to be transient: once the calculation is complete and has been sent to the remote host, the memory should be freed. What I am seeing, however, is a large number of (live) object arrays interleaved with free blocks of memory, e.g., taking a random segment from the LOH: 0:000> !DumpHeap 000000005b5b1000 000000006351da10 Address MT Size ... 000000005d4f92e0 0000064280c7c970 16147872 000000005e45f880 00000000001661d0 1901752 Free 000000005e62fd38 00000642788d8ba8 1056 <-- 000000005e630158 00000000001661d0 5988848 Free 000000005ebe6348 00000642788d8ba8 1056 000000005ebe6768 00000000001661d0 6481336 Free 000000005f214d20 00000642788d8ba8 1056 000000005f215140 00000000001661d0 7346016 Free 000000005f9168a0 00000642788d8ba8 1056 000000005f916cc0 00000000001661d0 7611648 Free 00000000600591c0 00000642788d8ba8 1056 00000000600595e0 00000000001661d0 264808 Free ... Obviously I would expect this to be the case if my application were creating long-lived, large objects during each calculation. (It does do this and I accept there will be a degree of LOH fragmentation but that is not the problem here.) The problem is the very small (1056 byte) object arrays you can see in the above dump which I cannot see in code being created and which are remaining rooted somehow. Also note that CDB is not reporting the type when the heap segment is dumped: I am not sure if this is related or not. If I dump the marked (<--) object, CDB/SOS reports it fine: 0:015> !DumpObj 000000005e62fd38 Name: System.Object[] MethodTable: 00000642788d8ba8 EEClass: 00000642789d7660 Size: 1056(0x420) bytes Array: Rank 1, Number of elements 128, Type CLASS Element Type: System.Object Fields: None The elements of the object array are all strings and the strings are recognisable as from our application code. Also, I am unable to find their GC roots as the !GCRoot command hangs and never comes back (I have even tried leaving it overnight). So, I would very much appreciate it if anyone could shed any light as to why these small (<85k) object arrays are ending up on the LOH: what situations will .NET put a small object array in there? Also, does anyone happen to know of an alternative way of ascertaining the roots of these objects? Thanks in advance. Update 1 Another theory I came up with late yesterday is that these object arrays started out large but have been shrunk leaving the blocks of free memory that are evident in the memory dumps. What makes me suspicious is that the object arrays always appear to be 1056 bytes long (128 elements), 128 * 8 for the references and 32 bytes of overhead. The idea is that perhaps some unsafe code in a library or in the CLR is corrupting the number of elements field in the array header. Bit of a long shot I know... Update 2 Thanks to Brian Rasmussen (see accepted answer) the problem has been identified as fragmentation of the LOH caused by the string intern table! I wrote a quick test application to confirm this: static void Main() { const int ITERATIONS = 100000; for (int index = 0; index < ITERATIONS; ++index) { string str = "NonInterned" + index; Console.Out.WriteLine(str); } Console.Out.WriteLine("Continue."); Console.In.ReadLine(); for (int index = 0; index < ITERATIONS; ++index) { string str = string.Intern("Interned" + index); Console.Out.WriteLine(str); } Console.Out.WriteLine("Continue?"); Console.In.ReadLine(); } The application first creates and dereferences unique strings in a loop. This is just to prove that the memory does not leak in this scenario. Obviously it should not and it does not. In the second loop, unique strings are created and interned. This action roots them in the intern table. What I did not realise is how the intern table is represented. It appears it consists of a set of pages -- object arrays of 128 string elements -- that are created in the LOH. This is more evident in CDB/SOS: 0:000> .loadby sos mscorwks 0:000> !EEHeap -gc Number of GC Heaps: 1 generation 0 starts at 0x00f7a9b0 generation 1 starts at 0x00e79c3c generation 2 starts at 0x00b21000 ephemeral segment allocation context: none segment begin allocated size 00b20000 00b21000 010029bc 0x004e19bc(5118396) Large object heap starts at 0x01b21000 segment begin allocated size 01b20000 01b21000 01b8ade0 0x00069de0(433632) Total Size 0x54b79c(5552028) ------------------------------ GC Heap Size 0x54b79c(5552028) Taking a dump of the LOH segment reveals the pattern I saw in the leaking application: 0:000> !DumpHeap 01b21000 01b8ade0 ... 01b8a120 793040bc 528 01b8a330 00175e88 16 Free 01b8a340 793040bc 528 01b8a550 00175e88 16 Free 01b8a560 793040bc 528 01b8a770 00175e88 16 Free 01b8a780 793040bc 528 01b8a990 00175e88 16 Free 01b8a9a0 793040bc 528 01b8abb0 00175e88 16 Free 01b8abc0 793040bc 528 01b8add0 00175e88 16 Free total 1568 objects Statistics: MT Count TotalSize Class Name 00175e88 784 12544 Free 793040bc 784 421088 System.Object[] Total 1568 objects Note that the object array size is 528 (rather than 1056) because my workstation is 32 bit and the application server is 64 bit. The object arrays are still 128 elements long. So the moral to this story is to be very careful interning. If the string you are interning is not known to be a member of a finite set then your application will leak due to fragmentation of the LOH, at least in version 2 of the CLR. In our application's case, there is general code in the deserialisation code path that interns entity identifiers during unmarshalling: I now strongly suspect this is the culprit. However, the developer's intentions were obviously good as they wanted to make sure that if the same entity is deserialised multiple times then only one instance of the identifier string will be maintained in memory.

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  • Facebook Connect: Error when clicking the Facebook Connect button

    - by Garrett
    I am getting this error when I click on the facebook connect button: API Error Code: 100 API Error Description: Invalid parameter Error Message: next is not owned by the application. I am not too sure how to do this, but I've read all the documentation for facebook connect and came up with this: <?php date_default_timezone_set("America/Toronto"); define('FACEBOOK_APP_ID', '##################'); define('FACEBOOK_SECRET', 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXX'); function get_facebook_cookie($app_id, $application_secret) { if(!isset($_COOKIE['fbs_' . $app_id])) return null; $args = array(); parse_str(trim($_COOKIE['fbs_' . $app_id], '\\"'), $args); ksort($args); $payload = ''; foreach ($args as $key => $value) { if ($key != 'sig') { $payload .= $key . '=' . $value; } } if (md5($payload . $application_secret) != $args['sig']) { return null; } return $args; } $cookie = get_facebook_cookie(FACEBOOK_APP_ID, FACEBOOK_SECRET); ?> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml"> <head> <!-- JQUERY INCLUDE --> <script src="js/jquery-1.4.2.min.js" type="text/javascript"></script> <!-- FACEBOOK CONNECT INCLUDE --> <script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php/en_US" type="text/javascript"></script> <script type="text/javascript"> <!-- $(document).load(function() { }); FB.init("XXXXXXXXXXXXXXXXXXXXXXx ", "xd_receiver.htm"); FB.Event.subscribe('auth.login', function(response) { window.location.reload(); }); function facebook_onlogin() { FB.getLoginStatus(function(response) { if (response.session) { // logged in and connected user, someone you know fb_login.hide(); } else { // no user session available, someone you dont know } }); } // --> </script> </head> <body> <div id="fb_login"> <fb:login-button onlogin="facebook_onlogin();" v="2">Log In with Facebook</fb:login-button> </div> <?php $user = json_decode(file_get_contents( 'https://graph.facebook.com/me?access_token=' . $cookie['access_token']))->id; ?> </body> </html> how on earth can i get this to work? thanks!

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  • Is there a javascript library that contains a rich set of very high level commonly used functions?

    - by bobo
    I find that many high level functions are missing in most well-known javascript libraries such as jquery, YUI...etc. Taking string manipulation as an example, startsWith, endsWith, contains, lTrim, rTrim, trim, isNullOrEmpty...etc. These function are actually very common ones. I would like to know if there exists a javascript library/ plugin of a javascript library that fills these gaps (including but not limited to string manipulation)? It would be great if the library does not override the prototype.

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  • CSS3 webkit fading in a tooltip.

    - by Kyle Sevenoaks
    HI, I've just been experimenting with a CSS tooltip that fades in with CSS3's transitions. I've got it working up to a point, but for some reason, when I hover over where it's meant to be, it activates, even though it's positioned left:-999px;. So basically, what am I doing wrong/is what I was going for possible? (Note I don't want to do anything with JS/JQuery, was just curious to see if I could do it in CSS) You can see and play with it here.

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  • Intel Wireless 4965AGN not achieving N throughput when connected to an Airport Express N network

    - by BenA
    I have an Intel Wireless WiFi Link 4965AGN adaptor in my laptop (HP Pavillion dv2000 series) which is connecting to a 5Ghz-only 802.11n network provided by an Apple Airport Express. The network is using WPA2 encryption. My desktop is also connected the Airport, via a Linksys WUSB600N USB adaptor. Both are running with the latest drivers, and the Airport is running the latest firmware. The Airport is also configured to use wide channels. The problem I have is that I never get throughput above 4MB/s when transferring files between the two machines. Even a pessimistic calculation shows a 270Mbps network as being capable of transfer rates at well above 10MB/s. I'm pretty sure I've isolated the issue to being the Intel adaptor, as wiring the desktop to the AP, and using the Linksys adaptor on the laptop immediately yielded speeds limited by the 100MB/s ethernet connection. I know that 802.11n is still a draft standard, and so mixing kit from different manufacturers can easily lead to poor results, but I was just wondering if anybody else out there has had success with this Intel adaptor on an N network? Or even better, connecting it to an Airport Express? Can anybody give me any advice on how to troubleshoot this issue? I should also mention that the Airport Express doesn't allow you to manually specify channels when running in N mode, and that I've been able to rule out interference from other Wireless LANs by scanning. There aren't any other 5GHz networks in my area. All ideas welcome! Update: A while later, I've just updated to the most recent drivers for both the Intel chip in the laptop, and the USB adaptor. Unfortunately this hasn't improved things :(. If anybody has any advice it would be be gratefully received.

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